Old Norse fló

← Old English flēah (cognate)

← German Floh (cognate)

← English flea (cognate)

← Proto-Germanic *flohō (derived)

← Proto-Germanic *flauhaz (inherited)

← Old High German flōh (cognate)

← Proto-Indo-European *plāk- (derived)

← Proto-Indo-European *pleh₂- (mention)

← Proto-Indo-European *plówkos (derived)

← Proto-Indo-European *plúsis (mention)

← Norwegian Bokmål flo (link)

← Dutch vlo (cognate)

→ English floe (derived)

→ Old English fleah (cognate)

→ Icelandic fló (derived)

→ Norwegian Nynorsk flo (inherited)